[R] lexicographic sort

Prof Brian D Ripley ripley at stats.ox.ac.uk
Sat Mar 16 08:00:11 CET 2002

On Fri, 15 Mar 2002, Makram Talih wrote:

> Hello,
> What is the rule R uses for lexicographical sort. For example,

It depends on the locale.

> sort("b","a") returns [1] "a" "b"

I get an error for that: it is incorrect usage.  I think you meant


etc, for which the results are consistent in 1.4.1 in my locale.

Are you using a current version of R (not that the usage has ever been
right AFAIK)?

> sort("b", " ") returns [1] " " "b"
> which seems to imply a space character has priority. But
> sort("jam on", "jambon") returns [1] "jambon" "jam on"
> Why does the rule change? Any hints/suggestions?

Read the help page?

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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